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Sodium nitrite as an inhibitor against the attack of sea-water on steel. III. Inhibitor in sea-water/distilled water mixtures

✍ Scribed by Hoar, T. P.

Publisher
Wiley (John Wiley & Sons)
Year
1950
Weight
648 KB
Volume
69
Category
Article
ISSN
0368-4075

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✦ Synopsis

Abstract

The corrosion of mild steel by sea‐water/distilled water mixtures at 25° or 60° c. can be completely inhibited by the presence of 3 percentage (w/v) of sodium nitrite greater than 1,5 of the sea‐water percentage (v/v). Similar sodium nitrite additions inhibit the corrosion of white metal by such waters and decrease the corrosion of copper (especially at 60°c. indicate they have no appreciable influence on the corrosion of brass at 25° c. Corrosion‐potential measurements at 25°c. indicate that nitrite is an anodic inhibitor. These and other results suggest that its main action is the oxidation of ferrous compounds to ferric, stannous to stannic, and cuprous to cupric, with a concomitant rise in pH, so that the very sparingly soluble higher oxides or hydrous oxides arc readily precipitated at anodic places and stifle corrosion.

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Sodium nitrite as an inhibitor against t
Sodium nitrite as an inhibitor against the attack of sea water on steel. Part I. The influence of sodium nitrite on the area and intensity of attack
✍ Wyllie, By D. ;Cheesman, G. C. N. 📂 Article 📅 1949 🏛 Wiley (John Wiley & Sons) ⚖ 445 KB 👁 1 views

## Abstract The prevention by sodium nitrite of the attack of sea water on steel has been studied in two ways. (a) Observation of the extent and nature of corrosion of mild steel specimens partially immersed in sea water containing nitrite. (b) Measurement of the corrosion currents using a divide